Pipe wrench



J. E. MAGNER Jan. 28, 1930.

PIPE WRENCH 2 Sheets--Sheeny l Filed Oct. 18, 1929 Jan. 2s, '1930. J, E,MAGNER 1,745,224

PIPE WRENCH Filed Oct. 21.8, 1929 2 Sheets-Sheet 2 s JEMg/ze swamGRM/nego.

Patented Jan. 28, 1930 UNEED STATES JAMES E. MAGNER, OF WATERLOO, IOWAPIPE WRENCH Application led October 18, 1929. Serial N'o. 400,642.

This invention aims to provide a wrench, the movable liaw of which maybe shifted quickly with respect to the fixed jaw, so as to adapt theWrench for articles of diierent 5 sizes and shapes. Another object ofthe invention is to provide novel means for disengaging the dog from thepinion of the wrench.

It is within the province of the disclosure to improve generally and toenhance the utility ot devices ot that sort to which the presentinvention appertains.

`With the above and other objects in view,

which will appear as the description proceeds, the invention resides inthe combination and arrangement of parts and in the details ofconstruction hereinafter described and claimed, it being understood thatchanges may be made in the precise embodiment of the 5 invention hereindisclosed, withinv the scope of what is claimed, without departing fromthe spirit ot the invention.

In the accompanying drawings:

Figure 1 shows in side elevation, a wrench constructed in accordancewith the invention, parts being broken away;

Figure 2 is a longitudinal section, parts being broken away, and partsremaining in elevation, the view depicting the wrench as it will appearwhen in position for work;

Figure 3 is a longitudinal section wherein parts are broken away, theparts being in the positions which they will assume when the dog isdisengaged from the pinion, to permit 5 a shittinov of the movable 'awof the wrench' C 7 Figure 4 is an elevation wherein the wrench is viewedat right angles to the showing of Figure 1;

Figure 5 is a transverse section on the line 5 of Figure 3.

The wrench forming the subject matter of this application comprises atrough-shaped body 1 in which a guide block 2 is held by securingelements 3. A detachable aw 4 is .5 iounted on the guide block 2.Although the jaw 4 may be detached for renewal, it may be describedproperly as the lined jaw ot the wrench. A wear strip 5 extends alongthe inner surface of the back ot the body 1 of 50 the wrench and hashooks 6 at its ends which engage the ends of the back of the body 1.Some persons may wish to dispense with the wear strip, and this ispermissible.

A slide 7, in the form of a bar, is mounted to reciprocate in the body1, between the wear strip 5 and the guide block 2. The slide 7 carries arack 8, and the slide, therefore, may be referred to as a rack bar. Theslide 7 has an end piece 9 carrying a removable aw 10 cooperating withthe jaw 4. Since the. slide 7 can move back and forth, the jaw 1() isthe movable jaw of the wrench.

A support 11, preferably in the form ot' a bolt, is mounted in the sidewalls of the body 1. On the support 11, a pinion 12 is mounted to turn.The pinion 12 meshes with the rack 8 of the slide 7 and is locatedwithin the body 1.

The handle of the wrench is marked by the numeral 14, and includes arms15. The back end of the body 1 is disposed between the arms 15 of thehandle 14, the arms 15 being mounted pivotally on the support 11. rIhus,the handle 14 is mounted to swing with respect to the body. carriedbythe arms 15 of the handle 14. A dog 17 is mounted to swing on thepivot element 16'. The dog 17 is disposed between the arms 15 of thehandle 14 and is so shaped as to engage with the teeth of the pinion 12and hold the pinion against rotation. The dog 17 has lateral projections18 adapted to cooperate with cams 19 on the body 1. A spring 2O isengaged around the pivot element 16. The spring 2() is loop-shaped, andits bend bears on the dog 17 and holds the dog yieldably engaged withthe pinion 12. The rear arms of the spring 2O are hooked over the parts15 of the handle 14. Springs 21 are engaged around the securing elements3. The rear ends ot' the springs 21 bear against the arms 15 of thehandle 14 and aid in keeping the handle in approximate parallelism tothe slide or rack bar 7 as shown in Figure 1 of the drawings.

lWhcn the parts are arranged as shown in Figure 2, the dog 17 is engagedwith the pinion 12, the pinion 12 meshes with the rack 8, the slide 7 isheld against reciprocation, and the jaw 10 remains fixed with re- Apivot element 16 is sol spect to the jaw 4. The operator can swing backthe handle 14 into the position of F igure 3, the springs 21 beingcompressed. nder such circumstances, the projections 18 of the dog 17are caused to cooperate With the cams 19 of the body l, and, thus, theholding dog 17 is lifted clear from the pinion 12. The inion, then, canrotate as the rack bar 7 sli es and the operator can move the rack bar 7back and forth to position the jaw 10 as desired with res ect to the jaw4.

After the necessary adiiustment has been made, the handle 14 can bebrought up into parallelism with the slide 7, as shown in Figure 2, thedog 17 engaging the pinion 12, to hold the pinion against rotation, andto keep the slide 7 in the position to which it has been adjusted.

What is claimed is:

1. A Wrench comprising a body having a fixed jaw, a rack bar slidable inthe body and having a movable jaw, a pinion journaled on the body andmeshing with the rack bar, and a. holding dog pivoted to the handle andengaging t e pinion, the dog and the body having coacting parts thatoperate calnwise to disengage t ie handle 1s swung with respect to thebody.

2. A Wrench comprisinor a body having a fixed jaw, a rack bar slidablein the body and having a movable jaw, a pinion journaled on the body andmeshing with the rack bar, a holdin dog pivoted to the handle andengaging te pinion, and means for moving the og with respect to thehandle, thereby to lift the dog clear of the pinion When the handle isswung with respect to the body.

3. A Wrench comprising a body having a fixed jaw, a rack bar slidable inthe body and having a movable jaw, a pinion journaled on the body andmeshin with the rack bar, a holding dog carried y the handle andengaging the pinion to hold the pinion against rotation, the dog beingdisengageable from the pinion when the handle is swung with respect tothe body.

In testimony that I claim the foregoing as my own, I have hereto afliXedmy signature.

JAMES E. MAGNER.

dog from the pinion when the

